Can’t find the ebuild containing nslookup or digg? Install the bind-tools:

# emerge -avD net-dns/bind-tools

and you’re all set:

# nslookup 127.0.0.1

Server:        xxx.yyy.zzz.1
Address:    xxx.yyy.zzz.1#53

1.0.0.127.in-addr.arpa    name = localhost.